Investigating contributing factors to HVDC corona noise

Experimental research on corona performance of HVDC transmission lines has become very important not only for existing transmission lines but for new lines as well. It has become an important research question how, on HVDC lines, ionised particles formed during corona are carried from conductor surroundings to the earth wire hence affecting power line carrier (PLC) communications. This research is important for determining the levels of radio interference (RI) that impact on communication systems, and the contributions of corona on power losses, audible noise and television interference. The aim of the paper is to demonstrate different ways of investigating corona noise in the laboratory